1 Goldilocks wanted things that were not too big. She also wanted things that were not too small. She wanted things just right. When you do art work, you want an art medium that is just right, too.2 A medium is what you use for an art project. You have many choices. One choice is watercolors. Watercolors dry fast. They are easy to use. They have been around for a long time. Ancient Egyptians used them. The ancient Chinese used them. You have probably used them, too.3 Another medium is oil paint. It is thick and oozy. Oils take a while to dry. You would need an adult's help to use oils. You need to clean up with a smelly liquid. It is called turpentine. It smells very strong. You might want to wait to use these paints until you are older.